Why is nitric acid added to Sodium Extract before adding Silvernitrate for testing halogens?
1 Answers
Talk Doctor Online in Bissoy App
Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 g mL–1
Solution: We have Mass percent of HNO3=69% Hence mass of HNO3 in the solution is 69g Mass of water=100-69=31g Number of moles of HNO3 =69/63=1.09moles Density=mass/volume Volume=mass/density =100/1.41=70.9ml Concentration (Molarity) = number of moles of solute/volume of the solution ...
1 Answers 1 views
How Sodium fusion extract is prepared?
A small piece of dry Sodium metal is heated with an organic compound in a fusion tube for 2-3 minutes and the red hot tube is plunged in to distilled...
1 Answers 1 views
Why is it necessary to use acetic acid and not sulphuric acid for acidification of sodium
Although the addition of sulphuric acid will precipitate lead sulphate, the addition of acetic acid will ensure a complete precipitation of sulphur in the form of lead sulphate due to...
1 Answers 1 views
10 gm of silver nitrate solution is added to 10 gm of sodium chloride solution. What change in mass do you expect after the reaction and why?
No change in mass will take place because mass can neither be created nor destroyed in a chemical reaction as law of conservation of mass states.
1 Answers 1 views
Explain why halogens are strong oxidizing agents.
[Hint : High electronegativity and more negative electron gain enthalpies of halogens.]
1 Answers 1 views
(i) Interhalogen compounds are more reactive than halogens except F2. Why ?
(i) Because X-X bond in interhalogens is weaker than X-X bond in halogens except for F-F bond. (ii) ClF3 is used for the production of UF6.
1 Answers 1 views
The amount of nitric acid required to oxidize 127 g of I2 to I2O5 will be? Assume that HNO3, gets converted to NO2.
The balanced chemical equation is given by I2 + 10HNO3 = I2O5 + 10NO2 + 5H2O Here 127 x 2 gm I2 is required to oxidise 63x10 gm of HNO3. So in 127 gm...
1 Answers 4 views
write chemical equation of the reaction of ethanoic acid with the following : (i) Sodium (ii) Sodium hydroxide (iii) Ethanol
(i) 2CH3COOH + 2Na → 2CH3COONa + H2 Sodium ethanoate (ii) CH3COOH +...
1 Answers 1 views
Concentrated nitric acid, upon long standing, turns yellow brown due to the formation
(b) The slow decomposition of HNO3 is represented by the eqn. 4HNO3 → 4NO2 + 2H2O + O2 ...
1 Answers 1 views
Ammonia on catalytic oxidation gives an oxide from which nitric acid is obtained. The oxide is : (a) N2O3
(c) [Fe(H2O)5NO]2+ ion is formed
1 Answers 1 views